// <copyright file="IFilter.cs" company="Math.NET">
// Math.NET Filtering, part of the Math.NET Project
// http://filtering.mathdotnet.com
// http://github.com/mathnet/mathnet-filtering
//
// Copyright (c) 2009-2014 Math.NET
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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namespace MathNet.Filtering
{
    /// <summary>
    /// An online filter that allows processing samples just in time.
    /// Online Filters are always causal.
    /// </summary>
    public interface IOnlineFilter
    {
        /// <summary>
        /// Process a single sample.
        /// </summary>
        double ProcessSample(double sample);

        /// <summary>
        /// Process a whole set of samples at once.
        /// </summary>
        double[] ProcessSamples(double[] samples);

        /// <summary>
        /// Reset internal state (not coefficients!).
        /// </summary>
        void Reset();
    }
}
